TWI721796B - Electro-mechanical torque wrench - Google Patents

Abstract

An electro-mechanical torque wrench having a body accommodated with a release mechanism, the release mechanism comprises a long beam and a short beam adjacently aligned to the long beam, wherein the long beam and the short beam are connected via a release member. Once a user operates the electro-mechanical torque wrench, the long beam and the short beam are torqued to produce flex. When the predetermined torque is reached, the release member is released to generate a click sound and vibration notifying the user to stop operation. At least one stress sensor is disposed at the long beam and connected to a display module for the purposes of sensing the variation of the long beam, sending relative information to the display module and displaying corresponded torque value digitally.

Description

Electronic mechanical torque wrench

The present invention is related to a torque wrench, in particular to an electromechanical torque wrench with a mechanical tripping structure and a function of digitally displaying torque values.

Because of its durability and high accuracy, mechanical torque wrenches are still widely loved by the public. Generally speaking, the mechanical torque wrenches mainly have a body, one end of the body is equipped with a working head, and the body The other end is provided with a handle, and the body is also provided with a tripping mechanism, the tripping mechanism is connected to the working head, so that when the user operates the mechanical torque wrench, the tripping mechanism will Withstand the torque transmitted by the working head, and when the torque is greater than the torque value set by the user, it will trip, accompanied by sound and vibration to remind the user to stop the operation. At the same time, the mechanical torque wrench is also equipped with a torque adjustment mechanism , The torque adjusting mechanism includes a spring, which allows the user to adjust the torque value by adjusting the compression amount of the spring.

However, the existing mechanical torque wrench has the following shortcomings. First, when the user applies force to the handle, the mechanical torque wrench cannot display the current torque value synchronously, so the user cannot know from the initial force to the The torque value between the actions of the tripping mechanism. Secondly, the user must reset the preset torque value of the conventional torque adjustment mechanism to zero after each use to avoid the phenomenon of elastic fatigue caused by the continuous compression of the spring. However, this mechanism will cause inconvenience to the user. Third, the torque adjustment mechanism is usually set on the side of the body, which makes it easy for the user to accidentally touch the torque adjustment mechanism during operation. Fourth, it is currently common The jump mechanism is mainly through the spring against a roller, and the roller against the inclined surface of the working head, so that when the torque is greater than the elastic force of the spring, the roller can be released. , But this design is bulky, so that the existing mechanical torque wrench has no space for installing sensors.

The main purpose of the present invention is to provide an electro-mechanical torque wrench, which has a mechanical trip structure and a digital display of the torque value function, and has the advantages of ease of use and easy interpretation of the torque value.

The secondary objective of the present invention is to provide an electro-mechanical torque wrench, which allows the user to adjust the torque value only by disarming an anti-mis-touch unit, so as to achieve the purpose of preventing mis-touch.

To achieve the above-mentioned main purpose, the electromechanical torque wrench provided by the present invention includes: a body with a hollow tube body, and one end of the tube body is provided with a working head, and the tube body The other end is provided with a handle, wherein the tube body is provided with a chamber, and the tube body is provided with a fixing hole and a shaft hole communicating with the chamber; and a trip mechanism, which is There is a long rod and a short rod adjacently arranged in the chamber, wherein one end of the long rod is connected to the working head, the other end is provided with a screw hole corresponding to the shaft hole, and one end of the short rod is connected At the other end of the working head, a pressure-receiving part is provided. At the same time, the middle section of the long rod is pivotally connected to a rotatable jumper, and one side of the jumper adjacent to the short rod is set corresponding to the pressure-receiving part. There is a pressing part, and an extension part extends away from the other side of the short rod. An elastic part is connected between the extension part and the long rod, so that the jumping part bears the elastic force provided by the elastic part, and there is The pressing part continuously presses against the movement tendency of the pressure receiving part. In addition, the tripping mechanism further has an abutting member arranged in the fixing hole, and the abutting member is provided with an abutting rod in the direction of the extension part ; And a torque adjustment mechanism, which has a screw passing through the shaft hole and the screw hole, and one end of the screw protruding outside the shaft hole and is provided with a knob, the knob can drive the screw to rotate, so that the The screw drives the long rod to adjust the position of the long rod; there is also a digital display unit, which has a display module arranged outside the body, and the display module is electrically connected with at least one strain sensor The strain sensor is arranged on the peripheral side of the long rod to sense the deformation of the long rod and send it to the display module so that the display module can output the corresponding torque in a digital display mode value.

In order to achieve the above-mentioned secondary purpose, the electromechanical torque wrench provided by the present invention includes: an anti-mistaken touch unit, which has a limit piece arranged on the tube body, and a screw arranged on the screw The operating member, and the operating member can only slide axially along the displacement direction of the screw, and has a locked position and an unlocked position. When in the locked position, the operating member is restricted by the limiting member, The screw cannot be rotated, and in the unlocked position, the operating member is separated from the limit of the limiting member, so that the screw can be rotated to adjust the torque.

In the electro-mechanical torque wrench provided by the present invention, when a user wants to lock a workpiece and apply force to the grip, the long rod and the short rod of the electro-mechanical torque wrench will be subjected to torque and bend. And when the torque reaches the preset torque value, the pressure-receiving part is released from the pressing part to generate mechanical sound and vibration to prompt the user to stop the operation, because the long rod and the short rod of the tripping mechanism The rod is a non-spring mechanism, and there is no elastic fatigue problem. When the user has finished using it, there is no need to reset the preset torque value of the torque adjustment mechanism to zero, which can greatly improve the user's convenience. At the same time, the strain sensor can be used The deformation of the long rod is sensed and transmitted to the display module to display the torque value in a digital display mode, which can achieve the purpose of having both a mechanical trip structure and a digital display torque value function. In addition, through the The anti-mistouch unit allows the user to press the operating element to make the operating element enter the unlocked position before turning the knob to adjust the torque value, thereby achieving the purpose of preventing misadjustment of the torque.

Please refer to Figures 1 and 2, which are a perspective view and a cross-sectional view of a preferred embodiment of the present invention, which disclose an electro-mechanical torque wrench 100. The electro-mechanical torque wrench 100 includes a body 10, and The main body 10 has a hollow tube body 11, one end of the tube body 11 is provided with a working head 12, and the other end of the tube body 11 is provided with a handle 13, wherein the tube body 11 is provided with a A chamber 111, the chamber 111 contains a tripping mechanism 20, and at least one shaft hole 112 communicating with the chamber 111 is provided on the outside of the tube body 11 adjacent to the handle 13, the shaft hole 112 A torsion adjustment mechanism 30 is inserted through the inner system, and a digital display unit 40 is further provided outside the tube 11 adjacent to the handle 13.

Please continue to refer to Figure 2, the tripping mechanism 20 mainly has a long rod 21 and a short rod 22 adjacently disposed in the cavity 111, wherein one end of the long rod 21 is connected to In one of the first connecting holes 121 of the working head 12, the other end extends along the axial direction of the pipe body 11 to be adjacent to the shaft hole 112, and a screw hole 211 is penetrated in the corresponding shaft hole 112, and the One end of the short rod 22 is penetrated and connected to a second connecting hole 122 of the working head 12, and the other end extends along the axial direction of the tube body 11 to a position close to the middle section of the long rod 21, and the short rod The other end of 22 is provided with a pressure-receiving part 221. In addition, the trip unit 20 further includes a trip member 23. The trip member 23 is located in the middle section of the long rod 21, and one end of the trip member 23 is A pivot pin 212 is pivoted on the long rod 21 so as to be rotatable relative to the long rod 21. At the same time, the other end of the jumper 23 extends in the direction of the short rod 22 and faces one of the short rods 22. A pressing portion 231 is provided on the side corresponding to the pressing portion 221. The pressing portion 2321 of the jumper 23 is adjacent to the short rod 22, and an extension portion 232 extends on the other side of the pressing portion 231. The extension 232 of the jumper 23 is far away from the short rod 22, and further includes an elastic member 24, such as a compression spring. One end of the elastic member 24 is received in a counterbore 213 provided in the long rod 21 The other end is connected to the extension portion 232, so that the jumper 23 bears the elastic force provided by the elastic member 24, and there is a movement tendency for the pressing portion 231 to continuously press against the pressing portion 221, In addition, the tube body 11 is provided with a fixing hole 113 communicating with the cavity 111 corresponding to the tripping member 23, and the tripping mechanism 20 has an abutting member 25, and the abutting member 25 is attached to the fixing hole 113. In the hole 113, a push rod 251 is provided in the direction of the extension 232, whereby when the user wants to lock a workpiece and apply force to the grip 13, the long rod of the electromechanical torque wrench 100 21 and the short rod 22 will be deflected by the torque. As the applied force increases, the jumper 23 gradually approaches the abutment piece 25, and when the torque reaches the preset torque value, the jumper 23 The extension portion 232 of the release member 23 is blocked by the abutting member 25 and rotates clockwise, so that the pressure-receiving portion 221 is released from the abutment portion 231, accompanied by a mechanical sound and slight vibration. , To prompt the user to stop the operation. Because the long rod 21 and the short rod 22 of the trip mechanism 20 are non-spring mechanisms, there is no elastic fatigue problem. When the user is finished using, there is no need to preset the torque adjustment mechanism 30 The torque value is reset to zero, so the user's convenience can be greatly improved.

Please refer to Figure 3 again, which is a cross-sectional view of the position of the torque adjustment mechanism of the preferred embodiment of the present invention. The torque adjustment mechanism 30 has a screw 31 passing through the shaft hole 112 and the screw hole 211, and One end of the screw 31 protrudes out of the shaft hole 112 and is provided with a knob 32. Preferably, the two sides of the tube body 11 respectively have shaft holes 112 corresponding to each other, and the other end of the screw 31 is provided with an end cover 33 , The end cap 33 is fixed to the shaft hole 112 on the other side of the tube 11, so that when the user drives the screw 31 to rotate through the knob 32, because the screw 31 is screwed to the In the screw hole 211 of the long rod 21, the long rod 21 will be moved by the screw 31 to move along the threading direction of the screw 31, so that the torque value of the electromechanical torque wrench 100 can be adjusted.

Please refer to Figure 4 again, which is an exploded view of the position of the torque adjustment mechanism of the preferred embodiment of the present invention. Please also refer to Figure 2 as shown. The digital display unit 40 has a body 10 The external display module 41, and the display module 41 is electrically connected with at least one strain sensor 42 which is arranged on the peripheral side of the long rod 21 as shown in the second figure. It is used to sense the deformation of the long rod 21 and send it to the display module 41 so that the display module 41 outputs the corresponding torque value in a digital display mode. The two ends of the long rod 21 are respectively connected to the The torque adjustment mechanism 30 and the work head 12, because the torque adjustment mechanism 30 will cause the long rod 21 to shift when the torque is adjusted, and when the work head 12 wants to tighten the workpiece, the user’s force will also cause the long rod 21 to move. The rod 21 is flexed. Therefore, based on the structure of the long rod 21 and the short rod 22, the strain sensor 42 must be attached to the peripheral side of the long rod 21 to enable the digital display unit 40 to truly display its The torque value. In addition, if the strain sensor 42 is attached to the short rod 22, when the predetermined torque is reached, the short rod 22 will jump off and collide with the inner edge of the tube 11, and the vibration generated by the collision will be extremely high. This may cause the strain sensor 42 to be damaged. In addition, in this embodiment, the digital display unit 40 has a plurality of strain sensors 42 which are symmetrically arranged around the long rod 21 Side, preferably, the long rod 21 has an upper face 21A facing the short rod 22, and a lower face 21B opposite to the upper face 21A, and the strain sensors 42 are partially arranged The upper face 21A is partially set on the lower face 21B. Since the side faces of the long rod 21 with a larger amount of variation when subjected to force are the upper face 21A and the lower face 21B, the sense of strain The sensor 42 attached to the above surface will have a better torque sensing value. In addition, the display module 41 is further electrically connected to a position sensor 43 disposed adjacent to the torque adjustment mechanism 30, and the position sensor 43 It is connected to the screw 31 through a linkage mechanism 44. In this embodiment, the linkage mechanism 44 has a first gear 441 connected to the screw 31 and a first gear 441 connected to the position sensor 43. Two gears 442, and a third gear 443 pivoted on the tube 11 and meshed between the first gear 441 and the second gear 442, wherein the first gear 441 is sleeved on the rod of the screw 31 Body, the tube body 11 is provided with a pivot hole 114, and the third gear 443 has a shaft 4431, the shaft 4431 passes through the pivot hole 114, so that the third gear 443 is pivoted on the tube The body 11 can thereby sense the variation of the screw 31 and send it to the display module 41 so that the display module 41 outputs the corresponding torque value, so that when the user operates the electromechanical torque wrench 100 , The torque value can be displayed digitally through the digital display unit 40, which is convenient for the user to interpret.

Please refer to Figures 5 and 6, which are a cross-sectional view and a schematic diagram of the action of the torque adjusting mechanism of the preferred embodiment of the present invention. Please also refer to Figure 4, where the tube 11 is adjacent to the The shaft hole 112 is provided with a plurality of positioning holes 115, and the electro-mechanical torque wrench 100 further includes an anti-mis-touch unit 50, the anti-mis-touch unit 50 has a fixing member arranged outside the tube body 11 51, and a limiting member 52 disposed in the cavity 111, wherein the fixing member 51 is provided with a reaming hole 511 corresponding to the shaft hole 112, and a plurality of through holes 512 are provided corresponding to the positioning holes 115, and The limiting member 52 is provided with a polygonal hole 521 corresponding to the shaft hole 112, and a plurality of locking holes 522 are provided corresponding to the positioning holes 112, and at the same time, a plurality of locking members 53 are respectively provided. The through hole 512, the positioning hole 115, and the locking hole 522 are provided in each group corresponding to the fixing member 51 and the limiting member 52 to the tube body 11, and the knob 32 is recessed on the outer side Take a accommodating groove 321, and a blind hole 311 deep inside the screw 31 is further recessed at the bottom of the accommodating groove 321, and at the same time the outer periphery of the screw 31 is penetrated with a long strip communicating with the blind hole 311 Hole 312, and the mistouch prevention unit 50 further includes an operating member 54 disposed on the tube body 11, the operating member 54 is accommodated in the cavity 321 and has a shaft portion 541 penetrating into the blind hole 311 The shaft portion 541 is provided with a perforation 542 corresponding to the elongated hole 312, and the perforation 542 is provided with a limiting pin 55. The end of the limiting pin 55 protrudes from the perforation 542 and is located in the elongated hole 312 , So that the operating member 54 can only slide axially along the displacement direction of the screw 31, and has a locked position and an unlocked position. In the locked position, as shown in Figure 5, the limit The positioning pin 55 is limited in the polygonal hole 521 of the limiting member 52, so that the screw rod 31 cannot rotate. In the unlocked position, as shown in Figure 6, the limiting pin 55 is separated from the limiting member. The position limit of the polygonal hole 521 of 52 allows the screw 31 to rotate to adjust the torque. In addition, the shaft 541 is located at one end of the accommodating groove 321 and is expanded to form a head 543. At the same time, the anti-mistouch unit 50 is further A spring 56 is included. The spring 56 is sleeved on the shaft portion 541, and the two ends of the spring 56 abut against the inner wall surface of the head 543 and the receiving groove 321 respectively, so that the operating member 54 is received by the spring 56 provides elasticity, and there is a movement trend from the unlocked state to the locked state, so that the user must press the head 543 of the operating member 54 to make the operating member 54 enter the unlocked position. Turn the knob 32 to adjust the torque value, so as to achieve the purpose of preventing accidental touch.

Hereinafter, the characteristics of the present invention and the expected effects that can be achieved are stated as follows:

1. In the electromechanical torque wrench provided by the present invention, when the user operates the electromechanical torque wrench, the long rod and the short rod will be deflected by torque, and the torque reaches a preset torque value At the time, the pressing part is allowed to jump off the pressed part to generate mechanical sound and vibration to prompt the user to stop the operation. Since the long rod and short rod of the jumping mechanism are non-spring mechanisms, there is no elastic fatigue problem. There is no need to reset the preset torque of the torque adjustment mechanism to zero after use, which can greatly improve the convenience of use.

2. In the electromechanical torque wrench provided by the present invention, the long rod will be displaced when the torque adjustment mechanism adjusts the torque, and when the working head wants to tighten the workpiece, the user's force will also cause the long rod to move. The rod is deflected, so based on the structure of the long rod and the short rod, the strain sensor is attached to the peripheral side of the long rod, and the deformation of the long rod can be sensed and transmitted to the display mold. Group, make the digital display unit truly present its torque value by digital display, achieving the purpose of having both a mechanical tripping structure and a digital display of torque value.

3. In the electromechanical torque wrench provided by the present invention, when the user adjusts the torque value through the torque adjustment unit, the variation of the screw can be sensed through the position sensor and transmitted to the display module. The torque value is displayed in digital display mode to facilitate the user's interpretation.

4. With the electromechanical torque wrench provided by the present invention, the user must press the operating member through the anti-mistouch unit to make the operating member enter the unlocked position before turning the knob to adjust the torque value, so as to achieve The purpose of preventing misadjustment of torque.

In summary, the present invention has excellent practicality in similar products. At the same time, we have checked the domestic and foreign technical information about this type of structure. The literature has not found the same structure. Therefore, The present invention actually has the requirements for a patent for invention, and an application is filed in accordance with the law.

However, the above is only one of the preferred and feasible embodiments of the present invention. Therefore, any equivalent structural changes made by applying the specification of the present invention and the scope of the patent application should be included in the patent scope of the present invention.

100: Electromechanical torque wrench

10: body

11: Tube body

111: Chamber

112: Shaft hole

113: fixed hole

114: pivot hole

115: positioning hole

12: Working head

121: first connection hole

122: second connecting hole

13: Grip

20: Jump out of the mechanism

21: Long pole

21A: Upper face

21B: Lower face

211: screw hole

212: pivot pin

213: Counterbore

22: Short shot

221: Pressure

23: Jumper

231: Pressure

232: Extension

24: Elastic part

25: top piece

251: Arrival Bar

30: Torque adjustment mechanism

31: Screw

311: Blind Hole

312: Long strip hole

32: Knob

321: Conveyor

33: end cap

40: Digital display unit

41: display

42: Strain sensor

43: position sensor

44: Linkage mechanism

441: First Gear

442: second gear

443: Third Gear

4431: shaft

50: Anti-missing unit

51: fixed parts

511: Reaming

512: Through hole

52: limit piece

521: Polygonal hole

522: keyhole

53: lock firmware

54: operating parts

541: Shaft

542: piercing

543: head

55: limit pin

56: Spring

Figure 1 is a perspective view of a preferred embodiment of the present invention. Figure 2 is a cross-sectional view of the preferred embodiment of this creation. Fig. 3 is a cross-sectional view of the position of the torque adjusting unit of the preferred embodiment of this creation. Figure 4 is an exploded view of the position of the torque adjustment unit of the preferred embodiment of this creation. Figure 5 is a cross-sectional view of the position of the torque adjusting unit of the preferred embodiment of this creation. Figure 6 is a schematic diagram of the action of the preferred embodiment of this creation.

10: body

11: Tube body

111: Chamber

112: Shaft hole

113: fixed hole

12: Working head

121: first connection hole

122: second connecting hole

20: Jump out of the mechanism

21: Long pole

21A: Upper face

21B: Lower face

211: screw hole

212: pivot pin

213: Counterbore

22: Short shot

221: Pressure

23: Jumper

231: Pressure

232: Extension

24: Elastic part

25: top piece

251: Arrival Bar

30: Torque adjustment mechanism

31: Screw

32: Knob

33: end cap

40: Digital display unit

41: display

42: Strain sensor

43: position sensor

44: Linkage mechanism

441: First Gear

442: second gear

443: Third Gear

Claims (9)

An electromechanical torque wrench includes: a body with a hollow tube body, one end of the tube body is provided with a working head, and the other end of the tube body is provided with a handle, wherein , The tube body is provided with a chamber, and the tube body is provided with a fixing hole and at least one shaft hole communicating with the chamber; Rod and a short rod, wherein one end of the long rod is connected to the working head, the other end is provided with a screw hole corresponding to the shaft hole, one end of the short rod is connected to the working head, and the other end is provided with a The pressed part, while the middle section of the long rod is pivotally connected to a rotatable jumper, and one side of the jumper adjacent to the short rod is provided with a pressing part corresponding to the pressed part, and is away from the short rod On the other side, an extension portion is extended, and an elastic member is connected between the extension portion and the long rod, so that the jumping member bears the elastic force provided by the elastic member, and there is a device that allows the pressing portion to continuously press against the receiving member. The movement tendency of the pressing part. In addition, the tripping mechanism has an abutting member arranged in the fixing hole. The abutting member is provided with an abutting rod in the direction of the extension part; a torsion adjustment mechanism is provided with a penetration The screw passing through the shaft hole and the screw hole, and one end of the screw protruding out of the shaft hole is provided with a knob. The knob can drive the screw to rotate, so that the screw can screw the long rod to adjust the long rod And a digital display unit, which has a display module arranged on the body, and the display module is electrically connected with at least one strain sensor, the strain sensor is arranged on the long rod The peripheral side can sense the deformation of the long rod and send it to the display module so that the display module outputs the corresponding torque value in a digital display mode. At the same time, the display module is electrically connected to a nearby The torque adjustment mechanism is provided with a position sensor, and the position sensor and the screw are connected through a linkage mechanism. The position sensor can sense the variation of the screw and send it to the display module Group to make the display module output the corresponding torque value. The electromechanical torque wrench according to the first item of the patent application, wherein the long rod has an upper face facing the short rod, and a lower face opposite to the upper face, and the digital display The unit has a plurality of strain sensors, and the strain sensors are partly arranged on the upper face and partly arranged on the lower face. The electromechanical torque wrench according to the first item of the scope of patent application, wherein the linkage mechanism has a first gear connected to the screw, a second gear connected to the position sensor, and a pivot A third gear arranged on the tube body and meshed between the first gear and the second gear. The electromechanical torque wrench according to item 3 of the scope of patent application, wherein the pipe system is provided with a pivot hole, and the third gear train has a rotating shaft, and the rotating shaft system penetrates through the pivot hole so that the The third gear is pivoted on the tube body. According to the first item of the scope of patent application, the electromechanical torque wrench further includes an anti-mistaken touch unit, which has a limit element provided on the tube body and an operating element provided on the screw, And the operating element can only slide axially along the displacement direction of the screw, and has a locked position and an unlocked position. When in the locked position, the operating element is restricted by the limiting element to make the screw It cannot be rotated, and when in the unlocked position, the operating member is separated from the limit of the limiting member, so that the screw can be rotated to adjust the torque. According to the electronic mechanical torque wrench described in item 5 of the scope of patent application, wherein the knob is recessed with a pocket on the outer side, and a blind hole deep into the screw is further recessed at the bottom of the pocket, and at the same time The outer periphery of the screw is provided with a long hole communicating with the blind hole, and the operating member is accommodated in the cavity and has a shaft portion penetrating the blind hole, and the shaft portion corresponds to the length The perforation is provided with a perforation, and the perforation is provided with a limit pin, and the end of the limit pin protrudes from the perforation and is located in the elongated hole, so that the operating member can only slide axially along the displacement direction of the screw . According to the electronic mechanical torque wrench described in item 6 of the scope of patent application, the limiting member is provided with a polygonal hole corresponding to the shaft hole, so that when the operating member is in the locked position, the limiting member The pin is restricted in the polygonal hole, so that the screw cannot be rotated, and in the unlocked position, the limiting pin is separated from the polygonal hole, so that the screw can rotate. According to the electronic mechanical torque wrench described in item 6 of the scope of patent application, wherein the shaft portion is located at one end of the receiving groove and is expanded to form a head, and at the same time, it further includes a spring which is sleeved on the shaft portion And the two ends of the spring abut against the inner wall surface of the head and the cavity respectively, so that the operating member bears the elastic force provided by the spring, and there is a movement tendency from the unlocked state to the locked state. According to the electronic mechanical torque wrench described in item 5 of the scope of patent application, the pipe system is provided with a plurality of positioning holes, and the limiting member is provided with a plurality of locking holes corresponding to the positioning holes, and also includes There is a fixing piece, the fixing piece is arranged outside the tube and is provided with a plurality of through holes corresponding to the positioning holes, and further includes a plurality of locking members, and the locking members are respectively penetrated through each group of the corresponding The through hole, the positioning hole and the locking hole are used to fix the limiting member to the tube body.

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